A continuous automated process and production line for preparing an acid doped polybenzimidazole, PBI, polymer membrane film for use in a fuel cell, the process comprising a washing stage, a drying procedure, and a doping stage.

A method for producing a polybenzimidazole precursor polyamide including a repeating unit represented by the following formula (2): ##STR00001##
wherein R.sup.f is —SO.sub.2—, —O—, —CO—, an alkylene group optionally containing a substituent, or a group represented by the following formula: ##STR00002##
two Xs are each individually a monovalent organic group; and R.sup.1 is a divalent organic group, the method including: a step (1-1) of polymerizing a tetramine compound (3) and a dicarboxylic acid derivative compound (4) as defined herein to provide the polybenzimidazole precursor polyamide.

A method for producing a polybenzimidazole precursor polyamide including a repeating unit represented by the following formula (2): ##STR00001##
wherein R.sup.f is —SO.sub.2—, —O—, —CO—, an alkylene group optionally containing a substituent, or a group represented by the following formula: ##STR00002##
two Xs are each individually a monovalent organic group; and R.sup.1 is a divalent organic group, the method including: a step (1-1) of polymerizing a tetramine compound (3) and a dicarboxylic acid derivative compound (4) as defined herein to provide the polybenzimidazole precursor polyamide.

A fluorine-containing polybenzimidazole containing a repeating unit represented by the following formula (1): ##STR00001## wherein R.sup.f is —SO.sub.2—, —O—, —CO—, an alkylene group optionally containing a substituent, or a group represented by the following: ##STR00002## wherein two Xs are each individually a hydrogen atom or a monovalent organic group; and R.sup.1 is a divalent organic group. Also disclosed is a polybenzimidazole precursor polyamide, a polybenzimidazole production method, film, flexible wiring board, printed circuit board, and polymer electrolyte membrane.

A fluorine-containing polybenzimidazole containing a repeating unit represented by the following formula (1): ##STR00001## wherein R.sup.f is —SO.sub.2—, —O—, —CO—, an alkylene group optionally containing a substituent, or a group represented by the following: ##STR00002## wherein two Xs are each individually a hydrogen atom or a monovalent organic group; and R.sup.1 is a divalent organic group. Also disclosed is a polybenzimidazole precursor polyamide, a polybenzimidazole production method, film, flexible wiring board, printed circuit board, and polymer electrolyte membrane.

A method for producing a polybenzimidazole precursor polyamide including a repeating unit represented by the following formula (2):

##STR00001##

wherein R.sup.f is —SO.sub.2—, —O—, —CO—, an alkylene group optionally containing a substituent, or a group represented by the following formula:

##STR00002##

two Xs are each individually a monovalent organic group; and R.sup.1 is a divalent organic group, the method including: a step (1-1) of polymerizing a tetramine compound (3) and a dicarboxylic acid derivative compound (4) as defined herein to provide the polybenzimidazole precursor polyamide.

A method for producing a polybenzimidazole precursor polyamide including a repeating unit represented by the following formula (2):

##STR00001##

wherein R.sup.f is —SO.sub.2—, —O—, —CO—, an alkylene group optionally containing a substituent, or a group represented by the following formula:

##STR00002##

two Xs are each individually a monovalent organic group; and R.sup.1 is a divalent organic group, the method including: a step (1-1) of polymerizing a tetramine compound (3) and a dicarboxylic acid derivative compound (4) as defined herein to provide the polybenzimidazole precursor polyamide.

The present disclosure provides a photoresist. The photoresist is formed by a crosslinking polymerization reaction between a reactive group-containing biimidazole molecule and a nitrogen-containing compound.

The present disclosure provides a photoresist. The photoresist is formed by a crosslinking polymerization reaction between a reactive group-containing biimidazole molecule and a nitrogen-containing compound.

The present disclosure relates to a polybenzimidazole-based electrolyte membrane for alkaline water electrolysis, which includes a polybenzimidazole-based polymer, wherein the polybenzimidazole-based polymer is a biaxially oriented film. The polybenzimidazole-based electrolyte membrane for alkaline water electrolysis can reduce the concentration of an alkaline solution by improving the crystallinity of a polybenzimidazole-based polymer to increase the resistance against base, significantly improving the long-term stability of alkaline water electrolysis using a polybenzimidazole-based electrolyte membrane through the improved resistance against base, and by increasing the operation temperature to enhance the catalyst activity.